string = "他问,你知道cba是什么单词的缩写么   ?    "
print(string)
print('1.删除空格')
print('2.英文标点替换')
print('3.首字母大写')
print('退出')
while True:
    option =input("请输入功能选项：\n")
    if option=='1':
        string =string.replace(' ','')
        print(string)
    elif option =='2':
        #替换英文标点
        for i in string:
            if i==',':
                string =string.replace(',','，')
            elif i=='.':
                string =string.replace('.','。')
            elif i=='?':
                string =string.replace('?','？')
            elif i=='?':
                string =string.replace("'","’")
        string =string
        print(string)
    elif option =='3':
        #首字母大写
        string =string.upper()
        print(string)
    elif option =='4':
        break

